Right before the cowboy streak segment, that's what everyone tunes in for so that's advertising gold right there.

aahh, i see

i like when people mention the name of the company at the beginning in a very quick sentence, similar to what @kr does in his podcasts (even though I can't find a good example right now):

"This episode is sponsored by X. We're going to tell you more about them later."

And then you just do your normal stuff and then when it's usually a good time for a break, you can mention them more.

mentioning them at the end may be weird since i think less people are going to listen to it then.

maybe you can just pretend like it's another story of the week / one of your personal top stories you want to bring up but it's actually the sponsor ad? so something very "immersive"

the best ad is the one which doesn't sound or look like an ad. without not clarifying that it's actually an ad, lol